JP2577064Y2 - Time indicator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time indicator for displaying an approximate elapsed time by fading a sample portion.

[0002]

2. Description of the Related Art As a time indicator for detecting an approximate elapsed time, an indicator utilizing discoloration of a sample is known. This is an application of the property that a specific substance undergoes a chemical change by a specific gas, particularly oxygen, to change color.

[0003]

In the above method, it is necessary to seal the sample with an oxygen scavenger so that the sample does not come into contact with oxygen until the start of use, so that the structure becomes complicated and handling becomes complicated. In addition, there are problems that the material is expensive and the cost is high. The present invention focuses on such a point, and has been made to provide an inexpensive time indicator that is easy to handle.

[0004]

In order to solve the above-mentioned problems, according to the present invention, one sample portion made of a colorant having low light resistance or a plurality of sample portions having different degrees of fading is used as a base material. It is formed on the surface and the upper surface is covered with a light-shielding protective layer. On the surface of the base material, a reference color portion indicating the fading of one sample portion or a plurality of sample portions having different degrees of fading may be provided. Further, a structure in which release paper is laminated on the back surface of the substrate on which the sample portion is provided via an adhesive layer may be employed.

[0005]

The sample portion is discolored by leaving it in a place where a light beam hits, so that the approximate elapsed time can be known from the discoloration state. Further, by providing a reference color portion made of a colorant having high light resistance together with the sample portion on the surface of the base material, it is easy to determine the fading state of the sample portion. In addition, by having a structure in which release paper is laminated via a pressure-sensitive adhesive layer on the back surface of the substrate on which the sample section is provided, it is possible to have a function as an adhesive label.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is an enlarged cross-sectional view in the thickness direction.
Substrates made of aluminum foil, synthetic resin film, etc., 2a, 2b,
2c is a sample portion formed on the surface of the substrate 1, 3 is a translucent release agent layer formed on the surface of the substrate 1 provided with these sample portions, 4 is paper, aluminum foil, A protective layer in which a pressure-sensitive adhesive layer 6 is formed on one side of a light-shielding layer 5 made of a colored synthetic resin film or a laminate thereof, and the protective layer 4 covers at least the sample portions 2a, 2b, and 2c. The surface is stuck. A release paper 8 is laminated on the back surface of the base material 1 via an adhesive layer 7.

Reference numeral 9 denotes a flaky time indicator composed of a laminate of the above-mentioned layers. The overall shape of the time indicator can be any suitable shape such as a rectangle as shown in FIG. The sample portions 2a, 2b, and 2c are formed by using a colorant having low light resistance such as a dye and having a different degree of fading, and when used, release the release paper 8 on the back surface and remove the sample. And the protective layer 4 on the surface is peeled off so that the sample portions 2a, 2b and 2c are exposed to light. Since the sample sections 2a, 2b, and 2c gradually fade with time, for example, the number of days required until the color almost disappears is 10 days for the sample section 2a, 20 days for 2b, and 30 days for 2c.
By designing so as to be days, the approximate elapsed time can be known from the degree of disappearance of the color of each sample portion and a comparison between them. Even without waiting for the color to disappear, the approximate elapsed time can be known from the progress of fading in the middle, and in some cases, even if only one sample part is used, the approximate elapsed time can be known from the progress of fading. be able to.

As described above, the elapsed time can be determined from the fading state of each of the sample portions 2a, 2b, 2c. However, if there is some reference that can compare the colors of the sample portions, the judgment can be made easily. FIG.
Reference numerals 10a, 10b, and 10c are reference color portions provided for this purpose. The reference color portions are formed using a colorant having strong light resistance so as to show a color state after or in the middle of each sample portion. In the case where only one sample portion is provided as described above, comparison judgment is facilitated by providing a plurality of reference color portions having a color tone corresponding to the progress of fading.

Next, an example of forming the sample portions 2a, 2b, 2c will be described. Dyes having low light fastness are used. For example, methylene blue FZ (M
ETHYLENE BLUE FZ) is red and Astraphloxin FF Conch (ASTRAPHLOX)
INE FF CONC) can be used. A sample part is formed by, for example, printing using an ink in which these dyes are dissolved in a medium for flexo (aqueous). At the time of this printing, the degree of fading of each sample portion is changed by changing the concentration of the dye or changing the printing thickness, and the printing thickness is changed by changing the number of times of printing or using a gravure method. For printing, it can be changed by changing the plate depth.

Specifically, for example, in gravure printing at 150 L / inch and a plate depth of 40 μm, the density of the ink is set at 0.1.
%, 0.2%, and 0.3%, the light resistance of each of the sample portions 10a, 10b, and 10c can be changed stepwise. In this case, the ink density is high. It becomes difficult to fade, and the time required for the color to disappear becomes longer. In the same 150L, the plate depth was set to 40 μm and 60 μm for each sample without changing the ink density.
m, 80 μm.
Under the same conditions of 0 L, plate depth of 40 μm, and ink concentration of 0.1%, the number of times of printing can be changed, such as one-time printing, two-time printing, and three-time printing. It becomes difficult to fade, and the time required for the color to disappear becomes longer. The reference color portions 10a, 10b, and 10c are appropriately printed in a predetermined color tone using an ink using a colorant having high light resistance such as a pigment.

[0011]

As is clear from the above description, the present invention forms one or a plurality of sample portions having different degrees of fading on the surface of a substrate by using a colorant having low light resistance, for example, a dye. In addition, the upper surface is covered with a light-shielding protective layer. Therefore, when used together with a light source that has a limited effective period, such as a fragrance or a deodorant, in a place where the light beam hits, it is possible to know the approximate elapsed time from the discoloration state of the sample portion due to the light beam. Therefore, a simple time indicator can be obtained at low cost. In addition, in the case of providing a reference color portion that can be compared with the color of the sample portion, the elapsed time can be easily determined, and in the case of a sticking label type in which release paper is laminated via an adhesive layer on the back surface of the base material. In addition, a time indicator that is easy to handle during use and has high commercial value can be obtained.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of one embodiment of the present invention in a thickness direction.

FIG. 2 is a perspective view of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Base material 2a, 2b, 2c Sample part 3 Release material layer 4 Light shielding protective layer 5 Light shielding layer 6 Adhesive layer 7 Adhesive layer 8 Release paper 9 Time indicator 10a, 10b, 10c
Standard color part

Claims (3)

(57) [Scope of request for utility model registration] 1. A sample section made of a colorant having weak lightfastness or a plurality of sample sections (2a, 2a) having different degrees of fading.
b, 2c) are formed on the surface of the substrate (1), and the upper surface is formed of a light-shielding protective layer.
A time indicator characterized in that it is detachably covered with (4). 2. A reference color part (10a, 10b, 10c) showing a fading state of one sample part or a plurality of sample parts (2a, 2b, 2c) having different degrees of fading is provided with a colorant having strong light resistance. 2. The time indicator according to claim 1, wherein the time indicator is provided along with the surface of the base material (1). 3. A substrate provided with one sample portion or a plurality of sample portions (2a, 2b, 2c) having different degrees of fading.
3. The time indicator according to claim 1, wherein a release paper (8) is laminated on the back surface of (1) via an adhesive layer (7).